Welcome to the Community! We hope you don't mind us answering in English 🙂
If you'd like to start over with a new account but want to keep part of your precious music collection, you can follow the steps in this Spotify Answer. There's an even more detailed step-by-step guide how to transfer your music here.
Hope this helps. Give us a shout if you have any other questions!
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"Where words fail, music speaks." - Hans Christian Andersen